DS1632

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power-up and via pushbutton input, power-fail status signals for the processor, and low battery warning

signals. The DS1632 is capable of detecting power failure at both the 5% and 10% power supply

tolerances, and the reset pulse width can be set for either 95 ms or 190 ms. The device is designed to

connect directly to popular laptop and notebook chip sets which eliminates the need for discrete

components and reduces cost.

BLOCK DIAGRAM Figure 1

OPERATION - CRYSTAL OSCILLATOR SECTION

The DS1632 crystal oscillator is designed to be hooked directly to a 32.768 kHz crystal. By using the

Daiwa Part No. DT26S, Seiko Part No. DS-VT-200 or equivalent, the oscillator will be accurate enough

to run a real time clock to within ±2 minutes per month. If another crystal is to be selected, it should have